Originally Posted by
Lyoness 
It can be extremely difficult, if not impossible, to quit using if your social circle revolves around using. Especially with marijuana which has such a strong culture around it. It may be hard for your son to give up his friends and his drug but he may have to for awhile, if not for good, to be able to successfully quit..
Yes yes yes. Think about it - can you actually picture your son hanging around these friends sober -- meanwhile the rest of them hit a bong and listen to the Grateful Dead? Ain't gonna happen.
The thing about those groups is the sooner you can ditch them, the better for recovery. Otherwise at some point, your SON will become the person being ditched. Then he will look around and see that he's the "last man standing" in the group...where did everyone go?
It's going to be very hard though, as the parent of an ADULT addict, to tell him this. Do you think he wants his mom telling him who to hang out with? As a 21 year-old he wants to make his own choices. I think you need to be sensitive to that issue when talking with him or figuring out your next steps.